1. Protect identities
Require MFA, protect administrator accounts, remove unnecessary access, secure account-recovery methods, and monitor for suspicious sign-ins, forwarding rules, and mailbox changes.
Law Firm Cybersecurity
How Law Firms Can Reduce Business Email Compromise and Wire Fraud
Law firms routinely handle sensitive client communications, payment instructions, settlement activity, and trust-related workflows that can be targeted through compromised or impersonated email accounts. Reducing business email compromise risk requires strong identity controls, independent verification of payment changes, secure email practices, monitoring, and a response process designed for time-sensitive fraud.
Direct answer
What is business email compromise in a law firm?
Business email compromise is fraud in which an attacker compromises or convincingly impersonates a trusted email account, person, client, vendor, or business partner to manipulate a legitimate business process. In law firms, the attack often targets payment instructions, invoices, settlements, or other high-value transactions. Controls should make one compromised mailbox insufficient to redirect money.
Four control layers that reduce BEC and wire fraud risk
2. Verify payment changes
Treat new or changed payment instructions as high-risk events. Verify them through a known, independent communication channel and use dual review for material transfers rather than relying on the requesting email.
3. Harden email workflows
Use anti-phishing protections, domain authentication, external-sender awareness, safer attachment and link handling, and staff procedures that make unusual requests easier to recognize and escalate.
4. Detect and respond quickly
Centralize relevant logs and alerts, define escalation contacts, preserve evidence, secure affected accounts, contact the financial institution quickly when funds may have moved, and document the incident for follow-up.
Controls law firms should operationalize
MFA and privileged access
Cover email, cloud storage, remote access, finance systems, and administrator accounts with strong authentication, while minimizing standing administrative privileges and documenting exceptions.
Known-channel verification
Verify new bank details, changed wire instructions, urgent payment requests, and exceptions using a phone number or contact method already known to the firm, not information contained in the suspicious message.
People and process controls
Train staff around realistic legal and payment scenarios, require escalation when requests depart from normal procedure, and make sure finance and legal personnel know that urgency or executive authority does not bypass verification.
Incident and recovery procedures
Document who disables sessions, resets credentials, reviews mailbox rules, preserves logs, contacts financial institutions, reports fraud, communicates with affected parties, and tracks remediation after an event.
Common BEC failure modes
Common failures include trusting a familiar display name, verifying changed payment details by replying to the same email thread, leaving MFA gaps, giving too many users administrator access, relying on annual awareness training alone, and discovering mailbox compromise only after a transaction has occurred.
Related law-firm cybersecurity guidance
Use these resources to broaden BEC prevention into the firm's overall security baseline, insurance evidence, and recurring protection of client information.
Primary sources used for this guidance
Last reviewed August 10, 2026. This guide uses current FBI/IC3 business email compromise guidance and CISA small-business security recommendations. It is operational security guidance, not legal advice.
Identify the law firm's highest-priority security gaps
The Smart Security Snapshot helps identify critical cybersecurity risks and turn them into a practical roadmap. For a broader view of how Smart Biz iT supports legal practices, review the law-firm cybersecurity and data-protection page.